X^2=720-X^2

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Solution for X^2=720-X^2 equation: 


Simplifying
X2 = 720 + -1X2

Solving
X2 = 720 + -1X2

Solving for variable 'X'.

Move all terms containing X to the left, all other terms to the right.

Add 'X2' to each side of the equation.
X2 + X2 = 720 + -1X2 + X2

Combine like terms: X2 + X2 = 2X2
2X2 = 720 + -1X2 + X2

Combine like terms: -1X2 + X2 = 0
2X2 = 720 + 0
2X2 = 720

Divide each side by '2'.
X2 = 360

Simplifying
X2 = 360

Take the square root of each side:
X = {-18.973665961, 18.973665961}

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